Quenched-tempered heat treatment method for bearing sleeve machining
A quenching and tempering heat treatment and bearing sleeve technology, which is applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems that the hardness of bearing sleeves cannot meet the requirements, reduce the service life of bearing sleeves, and the hardness of bearing sleeves is not high. Fracture, prolong service life, improve the effect of quenching quality
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[0017] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below.
[0018] A quenching and tempering heat treatment method for bearing sleeve processing, the steps of the heat treatment method are:
[0019] (1) Preheating treatment. The material of the bearing sleeve used in processing is 20CrMnTi steel. Preheat the previously rough-processed bearing sleeve to 350°C and keep it at a constant temperature for 30 minutes;
[0020] (2) The bearing sleeve is normalized and heated, and the bearing sleeve after the preheating in step 1 is further heated to 800°C for the second time, and then the temperature of the bearing sleeve after reaching the temperature is maintained for 3 hours, and the bearing is heated by multi-stage heating during processing. cover for heating;
[0021] (3) Quenching and cooling treatment. Take out the bearing sleeve heated by high temper...
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